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Simon Ser 5dfaf5ea9c backend/drm: introduce wlr_drm_bo_handle_table ... Using GBM to import DRM dumb buffers tends to not work well. By using GBM we're calling some driver-specific functions in Mesa. These functions check whether Mesa can work with the buffer. Sometimes Mesa has requirements which differ from DRM dumb buffers and the GBM import will fail (e.g. on amdgpu). Instead, drop GBM and use drmPrimeFDToHandle directly. But there's a twist: BO handles are not ref'counted by the kernel and need to be ref'counted in user-space [1]. libdrm usually performs this bookkeeping and is used under-the-hood by Mesa. We can't re-use libdrm for this task without using driver-specific APIs. So let's just re-implement the ref'counting logic in wlroots. The wlroots implementation is inspired from amdgpu's in libdrm [2]. Closes: https://github.com/swaywm/wlroots/issues/2916 [1]: https://gitlab.freedesktop.org/mesa/drm/-/merge_requests/110 [2]: 1a4c0ec9ae/amdgpu/handle_table.c		3 years ago
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bo_handle_table.h	backend/drm: introduce wlr_drm_bo_handle_table	3 years ago
cvt.h	backend/drm: add support for custom modes	5 years ago
drm.h	backend/drm: introduce wlr_drm_bo_handle_table	3 years ago
iface.h	backend/drm: introduce wlr_drm_bo_handle_table	3 years ago
properties.h	backend/drm: add support for FB_DAMAGE_CLIPS	3 years ago
renderer.h	backend/drm: introduce wlr_drm_bo_handle_table	3 years ago
util.h	backend/drm: introduce wlr_drm_bo_handle_table	3 years ago